Question
The lengths of Train A and Train
B are in the ratio 4:3. Train B, which has a length of 180 meters, takes 10 seconds to cross a bridge 80 meters long. If Train A crosses the same bridge at half the speed of Train B, how much time will it take for Train A to complete the crossing?Solution
ATQ, Length of train A = 4/3 × 180 = 240 m Speed of train B = (180 + 80)/10 = 260 m/sec Speed of train A = 1/2 × 26 = 13 m/sec Time taken by train A to cross the bridge = (240 + 80)13 = 320/13 seconds
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